1. Carrus, P. A., Fox, P. A., Haas, F., and Kopal, Z.: 1951,Astrophys. J. 113, 495.
2. Purohit, S. C.: 1974,J. Phys. Soc. Japan 36, 288.
3. Sedov, L. I.: 1959,Similarity and Dimensional Methods in Mechanics, Academic Press, London.
4. Singh, J. B.: 1982,Astrophys. Space Sci. 87, 347.
5. Singh, J. B. and Vishwakarma, P. R.: 1983,Astrophys. Space Sci. 95, 105 (this issue).